HasConstantTag.cs

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using System.Runtime.CompilerServices;
 
namespace System.Reflection.Metadata.Ecma335;
 
internal static class HasConstantTag
{
    internal const int NumberOfBits = 2;
 
    internal const int LargeRowSize = 16384;
 
    internal const uint Field = 0u;
 
    internal const uint Param = 1u;
 
    internal const uint Property = 2u;
 
    internal const uint TagMask = 3u;
 
    internal const TableMask TablesReferenced = TableMask.Field | TableMask.Param | TableMask.Property;
 
    internal const uint TagToTokenTypeByteVector = 1509380u;
 
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    internal static EntityHandle ConvertToHandle(uint hasConstant)
    {
        uint num = (uint)(1509380 >>> (int)((hasConstant & 3) << 3) << 24);
        uint num2 = hasConstant >> 2;
        if (num == 0 || (num2 & 0xFF000000u) != 0)
        {
            Throw.InvalidCodedIndex();
        }
        return new EntityHandle(num | num2);
    }
 
    internal static uint ConvertToTag(EntityHandle token)
    {
        HandleKind kind = token.Kind;
        uint rowId = (uint)token.RowId;
        return kind switch
        {
            HandleKind.FieldDefinition => (rowId << 2) | 0u, 
            HandleKind.Parameter => (rowId << 2) | 1u, 
            HandleKind.PropertyDefinition => (rowId << 2) | 2u, 
            _ => 0u, 
        };
    }
}